Door-operating mechanism



LNG

DOOR OPERATING MECHANISM Filed Feb, l0, 192.5 2. Sheets-Shea?.

Patented `Apr. 15, 1930 UNITED?" STATES! PHILIP LANG, OF (.ElDARFALLS,l IOWA, ASSIGNOR TO WAGNER MANUFACTURING i GOMFANY,A OF CEDAR FALLS,` IOWA i DWR-'OPERATING MECHANISM ApplicationldFbruary 10,'1925J- Serial No. 85287.

MyA -invention relates to improvements in door operating mechanism.`

The object of my invention is Vto.provide a door operating mechanismsupported by fluid pressure, and havinglmeanslwherebythe .last part foftheclosing; and; opening ,movement :of the door is gradually retardedV Vsoathat the door will? not islam;A

JMiother object of. myl invention is :to i provide a: door'operatingmcchanism in which the fluid pressure isreadil-y .controlled by the op*y erator oflthe elevatori-to which this invention is more particularly applied, and where by-:the door s operating mechanism cannot lbe operated untilthe car has reached a predetermined` point inrespecttothe door opening.

A `furtherl .object of my invention is toiprovide adoor operatingmechanism of this character which isreadily applied to .the ordinary elevator door operating mechanism having` certain details of structure 1 `and ,combination o'- parts hereinafter morefullyset forth.`

In i the accompanying a drawings Figure `1 isa side elevationfot the inside of an elevator shaft .showingzmy improved door operating mechanism applied thereto.`

Figure 2 is an 4enlarged side elevationot Figure v1 vshowingione of Vthe retarding cylinders partly in` section.

Figure 3 -is `a `front elevation of Figure .2 showing the operating cylinder lin section.

Figure 14 is an enlarged transverse sectional view taken on the line lf- 4 of Figure 3@ Figure 5 is a diagrammatical view'ofthe elevator shaft andi elevator showing.` the air controlled mechanism for opening and clos-lv ing the air controlled valve Referring; now to the drawings, 1 represents a portion of the elevator shaft whichl is provided with the usual door openings closed by the doori2. This door is of the vsliding type and is operated through the-medium of the leverB pivoted at 4;, said lever pivotally connected at to thelinlr 6, which is pivoted between the ears 7, carried by thelplate-S, secured tothe elevator shaft 1, andthus it will be fseen` that doy throwing the .lever i 3 downwardly, the joint between the lever and the link 6 is broken.` This construction is of an ordinary form and is shown `for the purpose of showing my` improved door operating mechanism which'may be coupled therewith so that the door can be A opened by handV should the fluid pressurebe cutoff at 'anyJ time.

The plate -Sfhas securedb thereto'` the lowerf. cap 9, and the uppercaplO. i The 4lowericap,V 9 `is internally 'threaded and-into which is` screwed the fluid pressure cylinderill, whichthe cap 10 simply surrounds lthe .upper endl of the cylinder and forms a support to-pre` vent the twisting action ofthecylinrder. Theupper end of the cylinder 11 is closed bygai cap `12, and extending down through,thecap 12 is the piston rodV lhaving at its lower end, within the cylinder, the piston le provided with any desired packingV 15 wherebyvthe es` cape oi' fluid from "below the piston is-:prevented. Surrounding thepiston rod 13 withe` in the cylinder 11 is a coil spring V16 which has its lower end bearing upon the upper end of the piston Maand its upper-end engaging,` the cap 12 whereby said spring Vis normally exerting a downward pressure upon the piston and holding it in its downward position as shown in Figure 3 ofthe drawings.

The piston rod-13 above the cap 12 is connectedlto a cross arm 17 which has its inner end provided with laterally extending :end- 18 entering the grooves 19 inthe plate20 which is riveted or bolted toftheplate 8. By this structure it will be seen that the cross head 17 is `reeto move by `the orceof the piston 13, and the outer end of the cross head 17 is provided with ears .21 betweenwhich is pivoted the linlr 22, which has its upper end pivotally connected between theears 23, carried by thelink 6. From the foregoing de-` scription it will be seen that the upward movement of the piston rod 13 causes the cross head 17 to move upwardly and throughthe medium of the link 22, the link 6 is moved upwardly on its pivotal connection with the ears 7 and the door opened, and the reverse movement `ot theV piston rod closes the door.

The cap 9 has secured to its lower face the rotary valve casing2/1 which has a communication with the lower end of the cylinder, and the rotary valve casing hasa valve stem 25 extending outwardly-theretrom, and L which carries the arm 26 which is pivotally connected at 27 to the upper end of the rod 28. This rod 28 passes through the cap rod casting 29, and surrounding the rod below the casting 29 is a coil spring 30 which normally holds the rod 28 in a downward position so that the rotary valve within the casing 24 is normally held closed so that the fluid pressure will not pass into the cylinder 11. The rotary valve casing 24 is supplied with a fluid pressure pipe 31 for maintaining a fluid pressure within the valve casing so that when the valve is oscillated the fluid pressure will be sup lied to the cylinder. The rod 2,8 is pivotefl) at 32 to the lever 33, pivoted at 34 to the elevator shaft, and said lever extends inwardly and is provided at its inner end with the roller 35. The elevator is provided with a. bell crank lever 36 connected to the rod 37 which extends downwardly and is pivotally connected at 38 to the intermediately pivoted lever 39 which is pivoted at 40 to the bracket 41 carried by the elevator. The outer end of the-lever 39 is pivotally connected at 42 to the shoe 43, and this shoe 43 has a link connection 44 with a bracket so that, when the rod 37 is moved upwardly the shoe 43 will move outwardly and maintain its vertical sition. The ends of the shoe are curved inwardly as indicated at 45 and 46 so that the roller 35 will engage the curved portion 45 of the shoe, and the lever 33 is rocked upon its pivot for forcing the rod 28 uowardl and opening the valve to admit the fluid pressure to the cylinder 11 below the piston 14.

In order to retard the upward movement of the piston rod 13 near the end of its upward stroke, and also to retard the downward movement of the piston rod near the end of its downward stroke I have provided two dash pots 47 and 48. The cross head 17 has secured thereto the rod 49 which extends downwardly through a guide 50 carried by the cap 9 .and extends down through the cap 51 which is rigidly supported by the plate 8. Pivotally mounted upon the cap 51, by means of the. ears 52 is a dash pot 48 carrying a piston 54 having a piston. rod 55 connected thereto, and extending outwardly beyond the cylinder and connected to the cross arm 56 carried by the rod 49. By this structure it will be seen that the rod 49 is connected with the piston 54 and the downward movement of the cross head 17 caused by the exertion of the spring 16 on the piston 14 is retarded near the end of its downward stroke.

Carried by the member 29 is a piston rod 57 which carries at its lower end the piston 58 which operates in the cylinder 47. The lower end of the rod 49 rigidly carries the arm 59 provided with ears 60 between which the lower end of the cylinder 47 is pivoted. By this structure it will be seen that as the cross head 17 is forced upwardly by the piston rod 13 through the medium of the fluid pressure, in the cylinder 11, the rod 49 is moved upwardly carrying with it the cylinder or dash pot 47 which is retarded by the piston 58 and is supported by the plate 8. In order to regulate the flow of fluid in both the dash pots 47 and 48 I have provided the by passes 61, and controlled by the needle valves 62, whereby the last part of the movement of the piston 13 is controlled in both directions.

lVhen the Huid pressure is released the spring 16 forces the piston 14 downwardly carrying with it the cross head 17 which in turn forces the rod 49 downwardly, and the same carrying the piston 55, and the piston working in the dash pot 48 the last part of the downward movement of the piston is retarded and the door1 is prevented from slamming when opening or closing.

Having thus fully described my invention what I claim is :k

1. The combination with a movable member, of a reciprocating dash pot for retarding the movement ot the said member in one direction, and a stationary dash pot for retarding the movement of the said member in the opposite direction.

2. The Combination with a movable member, of a reciprocating dash pot ttor retarding the last part of the movement of the said member in one direction, and a stationary dash pot adapted to retard the last part of the movement of the said member in the opposite direction.

3. The combination with a movable member, a dash pot connected to the said movable member for retarding the movement thereof in one direction, and a piston connected to the movable member and cooperating with a dash pot for retarding the movement of the member in the opposite direction.

4. The combination with a movable member, a dash pot connected to the movable member for cooperating with a stationary piston and retarding the movement of the movable member in one direction, and a piston connected to the movable member and cooperating with a stationary dash pot for retarding the movement of the movable member in the opposite direction.

5. The combination with member, a dash rocating member a reciprocating pot connected to the recipfor cooperating with a stationary piston for retarding the last part of the movement of the reciprocating member in one direction, and a piston connected to the reciprocating member and cooperating with a stationary dash pot for retarding the last part of the movement of the reciprocating member in the opposite direction.

6. The combination with a reciprocating member, a cross head connected to the reciprocating member, and a stationary and movable dash pot cooperating with the cross vto head for controlling the movement of the reciprocating member in both directions.

7. The combination with a reciprocating member, a cross head connected to the re ciprocating member, a movable dash pot connected to the cross head for retarding the movement of the reciprocating member in one direction, and a piston connected to the cross head and cooperating with a stationary dash pot for retarding the movement of the reciprocating member in the opposite direc' tion.

8. The combination with a reciprocating member, a cross head carried by the reciprocating member and two dash pots cooperating with the cross head, one for retarding the movement of the cross head in one .dire-ction and the other the movement thereof in the opposite direction.

9. The combination with a reciprocating member a cross head connected thereto, a dash pot connected to the cross head and cooperating with a stationary plunge-r for retarding the upward movement of the cross head in one direction, and a plunger carried by the cross head, and cooperating with the stationary dash pot for retarding the movement of the cross head in the opposite .direction.

10. The combination with a reciprocating member, a cross head connected thereto, a dash pot connected to the cross head and cooperating with the stationary plunger' for retarding the upward movement of the cross head in one direction, and a plunger carried by the cross head and cooperating with a stationary dash pot for retarding the movement of the cross head in the opposite direction.

11. The combination with a reciprocating member, a cross head connected to the reciprocating member, a dash pot carried by the cross head and cooperating with a sta tonary plunger tor retarding the upward movement of the piston, and a plunger con nected to the cross head and cooperating with a stationary dash pot for retarding the down ward movement of the piston.

12. The combination with a reciprocating member, a cross head connected to the reciprocating member, a rod connected to the cross head, a dash pot carried by the rod and cooperating with a stationary plunger tor retarding the upward movement of the reciprocating member, and a plunger carried by the rod and cooperating with a stationary dash pot for retarding the last part of the downward movement ot the reciprocating member.

In testimony whereof, I have signed this specication.

PHILIP LANG. 

